EFFECT OF CONCENTRATION OF MULTIWALLED CARBON NANOTUBES ON MECHANICAL STRENGTH OF ULTRA-HIGH PERFORMANCE NANOCOMPOSITE CEMENTITIOUS MATERIALS
Author(s):
MOHD. MUSHTAQ AHMED, DR. K. MANJULA VANI
Keywords:
UHPCC, cement, nanocomposite, bond, mechanical strength, MWCNT
Abstract
Ultra-high performance cementitious composites (UPHCC) with their unique composition, mechanical properties and high durability characteristics form the basis for the design and production of ultra-high performance concretes and special concretes that are required for extreme constructions, super-tall structures, bridge connections and special repairs. Calcium silicate hydrate (CSH) gel formation, which occurs at nanoscale level, is the main factor for strength gain of cement concrete. If a kind of nonoscale bonding can be developed between the CSH and the nanosized foreign material, that holds the cement matrix much better than the CSH itself, then the strength of cement concrete can be enhanced from the new nanocomposite. Multiwalled Carbon nanotubes (MWCNT), with their extraordinary mechanical properties and very high aspect ratio, are becoming the most promising nano materials. In this research, the MWCNT concentrations of 0.05, 0.15, 0.25, 0.35 and 0.5% by weight of cementitious paste are added to the cementitious matrix and their effect on mechanical properties, namely, compressive strength and split tensile strength are studied. Test results show that both the strengths can be improved with the inclusion of low concentration of MWCNTs.
Article Details
Unique Paper ID: 157416

Publication Volume & Issue: Volume 0, Issue no

Page(s): 28 - 33
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